You can use the cPanel to take a complete backup of all the files. To download the backup, search and go to the “Backups” section of the cPanel and then click on “Home Directory”
Another way of taking the backup is by using FTP clients like Filezilla for it. If you are unsure of how the FTP clients work, click here to check out a quick guide on it.
If you have multiple sites on the same host, FTP backup is more convenient. You just need to take a backup of the site you want to move.